Make Custom LED Strips

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Introduction: Make Custom LED Strips

About: Creating DIY projects

I recently made an infinity mirror cube and I wanted to have it be a specific size with a specific number of LEDs. None of the LED strips that I could find had the correct characteristics for what I wanted, so I made my own. These strips are not flexible, but that wasn't necessary for my project. The basis for these strips are custom designed circuit boards. I didn't make the boards myself, but I did design them. This Instructable is about the process of assembling these strips after I received them. I plan on coming back to this Instructable and add some steps about the design concepts.

I don't currently have an Instructable about designing these boards, but I did make a video describing the design. Maybe it could help you design your own if you choose this method. You can view that video here: https://youtu.be/o1eelFdcL0A

I also have a video that shows the steps from this Instructable. This video is actually about the whole infinity mirror cube project, but the assembly of these strips is in there, close to the beginning. You can view that video here: https://youtu.be/tmyQh9ZPkBg

Supplies

Step 1: Assembling the LED Side

My LED strips are about 3 inches long with 8 LEDs per strip. When assembling the surface mount components to all of the boards, I tried several things. Here is what was the easiest/quickest method that I have tried so far.

To attach the LEDs I started by putting some solder paste on 2 of the solder pads for each LED. Next I positioned each of the LEDs onto the board. Using a soldering iron with a bit of solder on the tip, I melted the solder paste to attach the LEDs to the board at those 2 connection points. For the other connections I applied some solder flux, then soldered them as normal.

Step 2: Assembling the Connections Side

Since the surface mount capacitors the LEDs need are very small, I needed a way to hold them in place while I soldered them. At first I just held them with my tweezers, which worked well, but took a long time holding everything steady. Here is what worked well for me:

Using a board with 2 screws, tied a string to one of those screws and wrapped the string around the other screw. This let me pull the string tight when I needed to hold the capacitor in place. I slid the strip under the string, put the capacitor in place, then carefully lift the string and position the capacitor beneath it. The capacitor will probably shift a bit, but pulling the string tight let me move the strip to re-position the capacitor. Next I apply some solder paste to one side of the capacitor and solder it in place. Now I could easily solder the other side of the capacitor in a normal manor. You can see that the solder paste leaves behind a bit of a residue, so don't forget to clean that up with rubbing alcohol before using these.

Step 3: Testing the Custom LED Strips

After soldering all of the parts to the strip, it's important to test it out. I connected it to an Arduino so that I could test it and make sure my soldering job works. If only some of the lights come on, there is likely a poor solder connection on the next LED. Re-solder it, then retest it. Make sure all of the LEDs light up before calling that strip good.

Step 4: And That's It!

And that's the custom strips! I used these LED strips that I made to build an Infinity Mirror Cube, and you can check out that Instructable here: https://www.instructables.com/id/Make-an-Infinity-Mirror-Cube/

I have also uploaded the Gerber files that I made for these on my GitHub page. If you want to have some made for you, just download the .zip file from my GitHub and upload the .zip file to the PCB manufacturer. Here is the link to my GitHub page: https://github.com/HowDoYouDIY/InfinityCube

Any tips on making this process easier is welcome. Also, I would love to know what other projects these types of LED strips would be great for. Thanks for checking out this Instructable!

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    7 Comments

    0
    deonjwessels
    deonjwessels

    Question 2 years ago

    Great idea with some useful assembly tips.
    Do you have the PCB manufactured with perforations to separate them?

    0
    How Do You - DIY
    How Do You - DIY

    Answer 2 years ago

    Yes. My PCB manufacturer has an option to panelize a PCB. Basically, I designed a single board, uploaded it to the manufacturer, then on the order form I selected to make a panel of 12 PCBs. They made them all at once, then they added the perforations for separation.

    0
    Mepel
    Mepel

    Reply 9 months ago

    Would you be willing/able to share your order specifications? I’m proficient enough to follow your build for the led strips, but knowledgeable enough to order the correct items from the company website you linked.

    0
    How Do You - DIY
    How Do You - DIY

    Reply 9 months ago

    I have a github page with files that can be downloaded. The gerber files that I used are there too. Here is a link to that page: https://github.com/HowDoYouDIY/InfinityCube

    And as for the options I chose when I placed the order, my video about building the cube shows all of the options that I chose. Here is a link to that video: https://youtu.be/tmyQh9ZPkBg

    Feel free to ask any other questions you have.

    0
    deonjwessels
    deonjwessels

    Reply 2 years ago

    Thanks, that is really useful to know.

    0
    getxboxcard
    getxboxcard

    2 years ago

    Great idea with some useful assembly tips